Hoisting mechanism.



E. Y/MDORE.

HOISTING MECHANISM.

APPLIOATION FILED D20. 24, 1910.

m EssEa' v. [NVJA/PQE,

Patented July 14,1914. I

UNITED STATES PA h OFFICE.

5 EDWARD Y. MOORE, 0F CLEVELAND, OHIO.

i 1 glasses.

ated with great rapidity and save the delay ordinarily consequent upon lowering th h chain and load hook betweensuccessive elevations of load. To this end I have provided a hoist with an endless chain and removable hooks, whereby the driving of the chain may be continuously in one direction, the hook being removed from the chain when the load has been elevated and a hook placed on the chain at a lower point for the succeeding load.

My invention, accordingly, consists broadly of an endless flexible depending member and means for supporting and driving it in one direction, and a removable load hook adapted to engage the flexible member at various points.

The invention includes also the more specific embodiment of such combination as shown herein and hereinafter specifically described.

In the drawings, Figure 1 is a side elevation of a hoisting mechanism embodying my invention, the intermediate portions of the lift chain being broken out; Fig. 2 is a per spective view of the load hook and a portion of the lift chain; Fig. 3 is a vertical section through the forked head of the load hook showing a portion of the lift chain in elevation; Fig. 4 is a vertical section through the lift wheel of'the hoist, being in a plane parallel with Fig. 1.

Fig. 1 of thfict ll'ill ll'l shows the hoist proper in the form a trolley hoist mounted on an I'-bea1n, but it is to be understood that this particular kind of a hoist is selected only by way of example. As shown in this figure, 10 represents the I-beam, 11 the frame of the hoist and 12 the supporting wheels riding on thelower flange of the I-beam.

The main driving shaft of the hoist shown is designated 16 and is rotated by any mechanism desired, as for example, a hand chain wheel, not shown. Rigid on this shaft may Specification of Letters latent.

HOISTING MECHANISM.

Patented July 14, 1914.

Application filed December24, 1910. Serial No. 599,140.

be a pinion 17 meshing with a gear 1.8 rigid with which is a pinion 19 (dotted lines Fig. 1) which meshes with a gear 20 rigid on a rotatable sleeve 21 on which is keyed a lift wheel The lift wheel is of the sprocket type usual in hoists having pockets to receive the links or the load chain 24. It may be noted in passing that 26 designates a gear guard, and 27 a clamp for locking the hoist t0 the I-heam. So much of the structure as has been described mav be of any approved construction, though that shown is eflicient for my purpose.

'1 he load chain 24- rei'erredt9 is endless. hanging over the lift wheel and depending in a bight in its two sides. The load hooks, of which several are shown, desigi'iatcd 30, are removably mounted on the chain. This engagement is provided by reason of the book being of a substantially S-form' with I its upper portion or head forked and thus adapted to straddle a link of the chain turned edgewise toward the shank of the hook and rest upon the next lower link, which has its vl'lat side toward the shank of the hook. As shown, 5-31 indicates the loop of the hook and 33 the bifurcated. head,

which parts are connected by a substantially straight shank. The head portion 3 is formed of two approximately parallel portions which hook downwardly and are spaced link turned edgewise to rest upon one turned crosswise ot the slot between the forks.

which shows how the hook, where it 011- gages the chain, rests on the shoulder of the link below it and embraces between its tines the next higher link. The embrace of this latter link is sufficiently loose to enable the hook to be easily put in place and is sufficiently close to prevent material turning of the chain with reference to the hook, so that the next lower link always forms an effective support for the tines 33. By hooking downwardly, these'tines prevent removal of the hook from the chain except when desired. The tines near their free ends may be tapered, if desired, as shown at 34%, to enable the hook to be more easily put in place.

It will be seen that such a hook as I have apart sufliciently so as to straddle a, chain using the hoist, it is driven only in one downwardly traveling stretch to return it for subsequent use. Several hooks may be employed, if desired. They may be taken off and accumulated at the upper end of the travel and sent down on the descending chain, one or more at a time. This is illustrated in Fig. l, where two hooks are shown 'on the descending portion of the chain.

With this mechanism, it is possible to send up more than one load at a time. It is possible also to drive the chain without stopping, an attendant at the lower end of the travel putting on the hook and a load and an attendant at the upper end taking off the load and hook. Accordingly, my hoist is adapted for various methods of operation as best fit the use to which it may be put.

It should be particularly noted that the lift chain hangs in a single loop, and is entirely free at its lower end, or anywhere except Where it rides on the lift wheel carried by the trolley. Accordingly, the trolley is able toshift the entire mcchanisn'i back and forth. to any desired position beneath the trackway.

Having thus described my invention, what I claim is 1, In a hoisting mechanism, the :ombination, with a pocket wheel and means for rotating it in one continuous direction, of an endless chain depending over said pocket wheel in a single continuous loop the lower end of which hangs free, said chain having its successive links at right angles to each other, and a removable hook forked at its upper end and adapted to straddle a link of the chain and rest on the upper shoulder of the next lower link. v

2. In a hoisting mechanism, the oo'rribination, with a trolley frame and supporting wheels, of a pocket wheel carried by the frame, and means carried by the frame for rotating said Wheel, and an endless chain depending over the pocket wheel and having its uppermost links occupying the pockets, said chain hanging in onefree continuous loop and having its successive links at right angles to each other, and a removable hook having a forked upper end adapted to straddlev a link and rest on the shoulder of the next lower link. I

3. In a device of the character described, the combination, with a trolley frame and supporting wheels, of a pocket wheel r0tatably carried by the trolley frame, means for rotating suchwheel, an endless, single loop chain overhanging the pocket wheel and resting in pockets thereof, the lower end of said chain being free whereby the chain may be moved laterally with the trolley, the successive links of said chain standing at right angles to. each other, and a load supporting S-hook having! its upper loop bifur- "cated to straddle one link of the chain resting on the shoulders of the next lower link. the tines provided by such bifurcation being formed with inward projections adapted to occupy the space between alternate links of the chain and substantially embrace the intermediate link, such tines resting on the shoulder of the link next below such intermcdiate link.

In testimony whereof, I hereunto atlix my signature in the presence of two witnesses.

EDlVARD' Y. MOORE. \Vitnesses:

V: MUMFonn Moons,

ion'r. R. RUBLE. 

